STRUCTURES OF RBD AND CSD BY TIME-OF-FLIGHT NEUTRON-DIFFRACTION

Rubidium deuteride, RbD, M(r) = 87.47, cubic, Fm3mBAR, a = 5.9705 (2) angstrom (10K), a = 6.0210 (2) angstrom (300K), V = 212.83 angstrom 3 (10K), V = 218.27 (2) angstrom 3 (300 K), Z = 4, D(x) = 2.66 g cm-3 (300 K), neutron time-of-flight, Rietveld refinement, wR(p), R(p), reduced chi-2 are 0.045, 0.031, 3.99 (10K), respectively, and 0.052, 0.037, 2.19 (300 K), respectively. Caesium deuteride, CsD, M(r) = 134.92, cubic, Fm3mBAR, a = 6.3741 (3) angstrom, V = 258.97 (4) angstrom 3, Z = 4, D(x) = 3.46 g cm-3, 300 K, neutron time-of-flight, Rietveld refinement, wR(p), R(p), reduced chi-2 are 0.070, 0.048, 1.30, respectively. RbD and CsD were confirmed to have the B1 (rocksalt) structure.